"Ankle bone" refers to the small, thick bone in your leg that connects your foot to your leg, allowing you to move your foot up and down. Full definition
I have heavy calves and big ankle bones despite a rather small frame elsewhere — always hate my legs and I do have to wear dresses a lot. (fabulousafter40.com)
A 52 - million - year - old ankle bone hints at first primates jumping rather than clambering from tree to tree — but what drove them to evolve this way is a mystery (newscientist.com)
Students 3D printed models of complex ankle bone fractures from CT scans of UC San Diego patients. (sciencedaily.com)